Why does my XBOX 360 shut off during gameplay?

The last few times I have played a game on my xbox, the console shuts off completely. There aren't any red lights on the power button. The system was bought brand new a year and a half ago. Any help would be awesome.

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Repairability

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It's time to speak out for your right to repair

We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.

Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!